一、基本情况 安徽省怀远县马城镇、孝仪乡地下砂层、砂砾层发育差,厚度小,分布不稳定且含有较多的粘土质,分选性较差,地表多为粘土或经风化的坡积物覆盖,不利于降雨入渗补给,故松散孔隙水较为贫乏。基岩裂隙仅在风化带或构造破碎带等局部地带有分布。该区波状起伏地形和不利的水文地质条件,导致该地区缺水易旱,枯水年(季)农村饮水非常困难,另外,人口增长、水环境污染及人口居住位置的不合理加剧了农村饮水困难。 First, the basic situation Huaiyuan County, Anhui Province, Ma Town, Xiaoyi Township underground sand, gravel layer poorly developed, small thickness, unstable distribution and contains more clay, poor sorting, the surface mostly clay or weathering Of the slope covered, is not conducive to rainfall infiltration supply, it is more porous loose water. Bedrock fissures are only distributed locally in weathered zones or structural crusts. The undulating terrain and unfavorable hydrogeological conditions in this area led to the lack of water and drought in the area. Drinking water in rural areas was extremely difficult in the dry season. In addition, the rural drinking water was aggravated by population growth, water pollution and irrational population residence difficult.